Re: stable 10GBE under 3.4.2 or 3.5.0-rc2

[Stefan Priebe - Profihost AG <s.priebe@profihost.ag>]

Am 18.06.2012 15:56, schrieb Mark Nelson:
> On 6/18/12 2:40 AM, Stefan Priebe - Profihost AG wrote:
>> Hi list,
>>
>> i've still problems with stable network speed under recent kernels. With
>> 3.0.32 i get stable 9.90 Gbit/s in both directions. With 3.4.2 or
>> 3.5.0-rc2 it drops sometimes down to around 1 Gbit/s. Sadly i've no idea
>> when this happen? It works sometimes for minutes at 9.9Gbit/s and then
>> suddently only with 3-4Gbit/s or even 1Gbit/s using recent kernels.
>>
>> I'm using various tunings recommanded by intel (Improving Performance)
>> => http://downloadmirror.intel.com/5874/eng/README.txt
>>
>
> Hi Stefan,
>
> Did you ever get a chance to talk to Jason Wang about the commit that
> was causing the problems? It might be a good idea to report all of this
> upstream and see what they have to say.

Hi Mark,

yes i talked to him and he told me that his change was partically 
removed in more recent kernel version.

Right now i'm in discussion with eric dumazet at the netdev kernel 
mailinglist. And he gives me some good advices which seem to work well.

I'm still testing and will share the results here.

Stefan